change mp4's fps and scale

change fps from 30fps to 25fps

$ ffmpeg -r 25 -i subject_001.mp4 25fps_subject_001.mp4
 
for scale the resolution,
 
$ ffmpeg -i subject_001.mp4     -vf     scale=1280:960        1280_960_subject_001.mp4

posted on 2021-01-06 19:21  cdekelon  阅读(89)  评论(0)    收藏  举报

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